Elevator electronic safety gear control system and elevator

Abstract

The elevator electronic safety gear control system comprises a main control MCU, a coil excitation control circuit, an energy storage emergency power supply circuit and a first voltage reduction circuit, and the main control MCU is connected with the coil excitation control circuit and the energy storage emergency power supply circuit. The energy storage emergency power supply circuit is connected with the input ends of the coil excitation control circuit and the first step-down circuit, and the output ends of the coil excitation control circuit and the first step-down circuit are connected with an electromagnet coil of the electronic safety tongs; the coil excitation control circuit comprises a coil excitation switch circuit and a coil excitation current sampling circuit; the energy storage emergency power supply circuit comprises a second step-down charging circuit, an energy storage emergency power supply and a first step-up discharging circuit. By sampling the exciting current, judging whether the electromagnet coil of the electronic safety tongs is jammed or not and arranging the energy storage emergency power supply, the emergency power supply matched with the electronic safety tongs can be provided under the emergency condition that the mains supply is abnormal, and the safety and the stability of the electronic safety tongs are optimized.

Description

Technical Field

[0001] This invention relates to the field of elevator electronic safety gear technology, and more particularly to an elevator electronic safety gear control system and an elevator. Background Technology

[0002] In recent years, with the rapid development of elevator technology, electronic safety brakes have become an indispensable component of elevators. Their application has significantly improved elevator safety. With technological breakthroughs in electronic safety brakes, existing models use electromagnets and elastic push rods to drive the moving wedge, replacing traditional complex mechanical components. This is particularly beneficial in home elevators (villa elevators), resulting in a more compact overall structure and improved transmission stability. Through a power-off trigger mechanism, they achieve millisecond-level braking response, effectively addressing emergencies such as elevator overspeed or loss of control, ensuring efficient, reliable, and comfortable elevator operation.

[0003] However, there are still some problems with the power supply control of electronic safety gears: Traditional electronic safety gear power supply systems consist of a power supply component connected to the mains power and an emergency power supply component. Under normal mains power conditions, the mains power supply component provides power, while in the event of a mains power failure, the emergency power supply component is required. However, the control of the emergency power supply component in existing electronic safety gear power supply systems has defects. The triggering and operation of the emergency power supply component in emergency situations cannot adapt to the needs of the electronic safety gear during normal operation, resulting in phenomena such as power supply voltage mismatch, insufficient power supply performance, and failure of delay control, leading to abnormal operation of the electronic safety gear. In addition, there is no armature jamming detection mechanism. When the electromagnet is in the energized state, the armature of the electromagnet coil of the electronic safety gear may jam, and the brake wedge is not fully opened. When the elevator is running in this state, the traction machine drive will output overload protection, causing the elevator to fail to operate normally and affecting the safety and stability of elevator operation. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides an elevator electronic safety gear control system and an elevator. By sampling the excitation current, it can determine whether there is a jamming phenomenon in the electromagnet coil of the electronic safety gear, and set up an energy storage emergency power supply, which can provide an emergency power supply adapted to the electronic safety gear in the event of a mains power failure, thereby optimizing the safety and stability of the electronic safety gear.

[0005] This invention provides an elevator electronic safety gear control system. The control system includes a main control MCU, a coil excitation control circuit, an energy storage emergency power supply circuit, and a first step-down circuit. The main control MCU is connected to the coil excitation control circuit and the energy storage emergency power supply circuit. The input terminals of the coil excitation control circuit, the energy storage emergency power supply circuit, and the first step-down circuit are connected to the mains power. The energy storage emergency power supply circuit is connected to the input terminals of the coil excitation control circuit and the first step-down circuit. The output terminals of the coil excitation control circuit and the first step-down circuit are connected to the electromagnet coil of the electronic safety gear.

[0006] The coil excitation control circuit includes a coil excitation switch circuit and a coil excitation current sampling circuit. The coil excitation switch circuit and the coil excitation current sampling circuit are connected to the electronic safety clamp electromagnet coil. The coil excitation switch circuit controls the on / off state of the electronic safety clamp electromagnet coil, and the coil excitation current sampling circuit samples the excitation current of the electronic safety clamp electromagnet coil.

[0007] The energy storage emergency power supply circuit includes a second buck charging circuit, an energy storage emergency power supply, and a first boost discharging circuit. The input terminal of the second buck charging circuit is connected to the mains power, and the output terminal of the second buck charging circuit is connected to the energy storage emergency power supply. The energy storage emergency power supply is connected to the input terminal of the first boost discharging circuit.

[0008] Furthermore, the coil excitation switch circuit includes a switching transistor Q1, and the main control MCU controls the conduction or cutoff of the electronic safety clamp electromagnet coil by controlling the switching transistor Q1 to conduct or cut off.

[0009] Furthermore, the coil excitation current sampling circuit includes a sampling resistor R1. The main control MCU samples the excitation current of the electronic safety clamp electromagnet coil based on the sampling resistor R1 and determines whether there is any jamming phenomenon in the armature of the electronic safety clamp electromagnet coil.

[0010] Furthermore, the main control MCU samples the excitation current of the electronic safety clamp electromagnet coil based on the sampling resistor R1, and determines whether there is any jamming phenomenon in the armature of the electronic safety clamp electromagnet coil, including:

[0011] The excitation current of the electromagnet coil of the electronic safety clamp is sampled, the jamming threshold current of the armature of the electromagnet coil when jamming occurs is calculated, the excitation current is compared with the jamming threshold current, and the jamming phenomenon is determined based on the comparison result.

[0012] Furthermore, the energy storage emergency power supply includes several supercapacitors connected in series. When the electronic safety clamp electromagnet coil is in normal working condition, the energy storage emergency power supply is charged based on the input of mains power. When the electronic safety clamp electromagnet coil is in emergency state, the energy storage emergency power supply discharges to the electronic safety clamp electromagnet coil.

[0013] Furthermore, the coil excitation control circuit also includes a QA contactor, one end of which is connected to the coil excitation switch circuit and the coil excitation current sampling circuit, and the other end of which is connected to the electronic safety clamp electromagnet coil.

[0014] Furthermore, the control system also includes an AC / DC conversion circuit, which is disposed between the coil excitation control circuit and the mains power, between the energy storage emergency power supply circuit and the mains power, and between the first step-down circuit and the mains power.

[0015] Furthermore, the control system also includes a third step-down circuit and an elevator status monitoring module. The input terminal of the third step-down circuit is connected to the mains power and the energy storage emergency power supply circuit, and the output terminal of the third step-down circuit is connected to the elevator status monitoring module.

[0016] Furthermore, the control system also includes an alarm module, which is connected to the main control MCU.

[0017] The present invention also provides an elevator, the elevator including an elevator electronic safety gear and the above-mentioned elevator electronic safety gear control system, the elevator electronic safety gear control system being used to control the operation of the elevator electronic safety gear.

[0018] This invention provides an elevator electronic safety clamp control system and an elevator. It includes a coil excitation control circuit that samples the excitation current of the electronic safety clamp's electromagnet coil to determine if the armature of the electromagnet coil is jammed, thereby controlling the working state of the electromagnet coil. If jamming occurs, the circuit is shut off promptly, improving the safety and stability of the electronic safety clamp. An energy storage emergency power supply circuit is also included to provide emergency power to the electronic safety clamp in case of mains power failure. By incorporating a second step-down charging circuit and a first step-up discharging circuit, the energy storage emergency power supply is adapted to the electronic safety clamp. After a delay control period, the mechanical structure of the electronic safety clamp is triggered only after the elevator car has come to a complete stop, effectively improving the safety and stability of elevator operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a module architecture diagram of the elevator electronic safety clamp control system in Embodiment 1 of the present invention;

[0021] Figure 2 This is a circuit diagram of the elevator electronic safety clamp control system in Embodiment 1 of the present invention;

[0022] Figure 3 This is a module architecture diagram of the excitation coil control circuit in Embodiment 1 of the present invention;

[0023] Figure 4 This is a module architecture diagram of the emergency power supply circuit in Embodiment 1 of the present invention;

[0024] Figure 5 This is a circuit diagram of the emergency power supply circuit in Embodiment 1 of the present invention;

[0025] Figure 6 This is a curve showing the relationship between current and time when the armature of the electronic safety clamp in Embodiment 1 of the present invention is normally engaged;

[0026] Figure 7 This is a curve showing the relationship between current and time when the armature of the electronic safety clamp in Embodiment 1 of the present invention experiences jamming. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In this invention, it should be understood that terms such as “comprising” or “having” are intended to indicate the presence of features, figures, steps, behaviors, components, portions or combinations thereof disclosed in this specification, and are not intended to exclude the possibility that one or more other features, figures, steps, behaviors, components, portions or combinations thereof are present or added.

[0029] It should also be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] Embodiment 1 of the present invention provides an elevator electronic safety clamp control system. The control system includes a main control MCU, a coil excitation control circuit, an energy storage emergency power supply circuit, and a first step-down circuit. The main control MCU is connected to both the coil excitation control circuit and the energy storage emergency power supply circuit. The input terminals of the coil excitation control circuit, the energy storage emergency power supply circuit, and the first step-down circuit are connected to AC mains power. The energy storage emergency power supply circuit is connected to the input terminals of the coil excitation control circuit and the first step-down circuit. The output terminals of the coil excitation control circuit and the first step-down circuit are connected to the electromagnet coil of the electronic safety clamp. The coil excitation control circuit includes a coil excitation... The circuit includes a magnetic switch circuit and a coil excitation current sampling circuit. The coil excitation switch circuit and the coil excitation current sampling circuit are connected to the electronic safety clamp electromagnet coil. The coil excitation switch circuit controls the on / off state of the electronic safety clamp electromagnet coil, and the coil excitation current sampling circuit samples the excitation current of the electronic safety clamp electromagnet coil. The energy storage emergency power supply circuit includes a second step-down charging circuit, an energy storage emergency power supply, and a first step-up discharging circuit. The input terminal of the second step-down charging circuit is connected to the mains power, and the output terminal of the second step-down charging circuit is connected to the energy storage emergency power supply. The energy storage emergency power supply is connected to the input terminal of the first step-up discharging circuit.

[0032] In one optional implementation of this embodiment, such as Figure 1 and Figure 2 As shown, Figure 1 This diagram illustrates the module architecture of the elevator electronic safety brake control system according to Embodiment 1 of the present invention. Figure 2 The diagram shows the circuit schematic of the elevator electronic safety gear control system according to Embodiment 1 of the present invention. The control system includes a main control MCU, a coil excitation control circuit, an energy storage emergency power supply circuit, and a first step-down circuit. The main control MCU is connected to the coil excitation control circuit and the energy storage emergency power supply circuit respectively. The input terminals of the coil excitation control circuit, the energy storage emergency power supply circuit, and the first step-down circuit are connected to the mains power. The energy storage emergency power supply circuit is connected to the input terminals of the coil excitation control circuit and the first step-down circuit. The output terminals of the coil excitation control circuit and the first step-down circuit are connected to the electromagnet coil of the electronic safety gear.

[0033] Specifically, the main control MCU controls the operation of the coil excitation control circuit and the energy storage emergency power supply circuit by sending PWM signals.

[0034] Furthermore, the main control MCU adopts the MM32F0020B1T main control chip.

[0035] In one optional implementation of this embodiment, such as Figure 3 As shown, Figure 3 The diagram shows the module architecture of the coil excitation control circuit in Embodiment 1 of the present invention. The coil excitation control circuit includes a coil excitation switch circuit and a coil excitation current sampling circuit. The coil excitation switch circuit and the coil excitation current sampling circuit are connected to the electronic safety clamp electromagnet coil. The coil excitation switch circuit controls the on / off state of the electronic safety clamp electromagnet coil, and the coil excitation current sampling circuit samples the excitation current of the electronic safety clamp electromagnet coil.

[0036] Specifically, the coil excitation switch circuit is used to control the operation of the electronic safety clamp electromagnet coil, and the coil excitation current sampling circuit is used to collect the excitation current of the electronic safety clamp electromagnet coil when it is working.

[0037] In one optional implementation of this embodiment, such as Figure 2 As shown, the coil excitation switch circuit includes a switching transistor Q1. The main control MCU controls the electronic safety clamp electromagnet coil to turn on or off by controlling the switching transistor Q1 to turn on or off, that is, to enter or exit the excitation working state.

[0038] Specifically, the drain of the switching transistor Q1 is connected to the mains power, the source of the switching transistor Q1 is connected to the electronic safety clamp excitation coil, and the gate of the switching transistor Q1 is connected to the reference voltage.

[0039] In one optional implementation of this embodiment, such as Figure 2 As shown, the coil excitation current sampling circuit includes a sampling resistor R1. The main control MCU samples the excitation current of the electronic safety clamp electromagnet coil based on the sampling resistor R1 and determines whether there is any jamming phenomenon in the armature of the electronic safety clamp electromagnet coil.

[0040] Specifically, one end of the sampling resistor R1 is connected to the mains power, and the other end of the sampling resistor R1 is connected to the electromagnet coil of the electronic safety clamp.

[0041] In one optional implementation of this embodiment, such as Figure 2 As shown, the first step-down circuit includes a first step-down chip U1, an inductor L1, a diode D1, a diode D2, and a diode D3;

[0042] One end of the first step-down chip U1 is connected to the cathode of the diode D1;

[0043] The other end of the first step-down chip U1 is connected to one end of the inductor L1 and the cathode of the diode D3;

[0044] The other end of the inductor L1 is connected to the anode of the diode D2;

[0045] The anode of diode D1 is connected to the drain of transistor Q1;

[0046] The cathode of the diode D2 is connected to the source of the transistor Q1.

[0047] Furthermore, the first step-down circuit is a buck step-down circuit, and the first step-down chip U1 is a TX4130L switching step-down DC / DC chip.

[0048] Specifically, when the mains power is normal and the control system is working properly, the mains power input is 46V. The main control MCU controls the switch Q1 to turn on, and the 46V is transmitted to the electronic safety clamp electromagnet coil through the switch Q1 as the excitation voltage to activate the electronic safety clamp electromagnet coil to enter the working state.

[0049] When the electronic safety clamp electromagnet coil is in the energized working state, the energizing current is sampled and detected by the sampling resistor R1 and fed back to the main control MCU. The main control MCU controls the 46V output to delay for 1 second, and then uses the first step-down circuit to reduce the 46V to 12V and transmit it to the electronic safety clamp electromagnet coil as the sustaining voltage to maintain the working state of the electronic safety clamp electromagnet coil.

[0050] More specifically, the standard for sampling resistor R1 to detect the excitation current is that when the detected excitation current of the electronic safety clamp is greater than 1A, it is determined that the excitation current has been detected and subsequent operations are performed.

[0051] In an optional implementation of this embodiment, the coil excitation control circuit further includes a QA contactor. One end of the dry contact of the QA contactor is connected to the coil excitation switch circuit and the coil excitation current sampling circuit, and the other end of the dry contact of the QA contactor is connected to the electronic safety clamp electromagnet coil.

[0052] Specifically, such as Figure 2 As shown, one end of the dry contact of the QA contactor is connected to terminal TS1 and to the switching transistor Q1 of the coil excitation switch circuit, and the other end is connected to terminal TS2 and to the electronic safety clamp electromagnet coil.

[0053] Specifically, the QA contactor is used to control the manual switching state of the electronic safety clamp electromagnet coil. When the QA contactor is closed, the electronic safety clamp electromagnet coil normally receives the excitation voltage and enters the working state.

[0054] In one optional implementation of this embodiment, such as Figure 4 As shown, Figure 4The diagram shows the module architecture of the energy storage emergency power supply circuit in Embodiment 1 of the present invention. The energy storage emergency power supply circuit includes a second buck charging circuit, an energy storage emergency power supply, and a first boost discharging circuit. The input terminal of the second buck charging circuit is connected to the mains power, and the output terminal of the second buck charging circuit is connected to the energy storage emergency power supply. The energy storage emergency power supply is connected to the input terminal of the first boost discharging circuit.

[0055] Specifically, the second step-down charging circuit is used to step down the mains power and then charge the energy storage emergency power supply.

[0056] In one optional implementation of this embodiment, the energy storage emergency power supply includes several supercapacitors connected in series. When the electronic safety clamp electromagnet coil is in normal working condition, the energy storage emergency power supply is charged based on the input of mains power.

[0057] Specifically, such as Figure 5 As shown, Figure 5 The circuit diagram of the energy storage emergency power supply circuit in Embodiment 1 of the present invention is shown. The energy storage emergency power supply circuit also includes a switching transistor Q2, an inductor L3, and a diode D6.

[0058] The output terminal of the second step-down charging circuit is connected to the drain of the switching transistor Q2, the gate of the switching transistor Q2 is connected to the main control MCU, the source of the switching transistor Q2 is connected to one end of the inductor L3 and the cathode of the diode D6, and the other end of the inductor L3 and the anode of the diode D6 are connected to the emergency power supply.

[0059] Furthermore, the second buck charging circuit is a buck circuit.

[0060] Specifically, when the electromagnet coil of the electronic safety clamp is in the voltage maintenance state, the 46V is stepped down to 20V through the second step-down charging circuit and used to charge the supercapacitor in the energy storage emergency power supply.

[0061] Furthermore, the charging process of the energy storage emergency power supply includes:

[0062] Switch Q2 acts as the charger, with a switching frequency of 20kHz, corresponding to a timer period of 2400 cycles in the main control MCU. The charging process of the supercapacitor includes two stages: a pre-charging stage, where the supercapacitor has low impedance in its initial state, so a soft-start control method is used, with a low charging voltage to avoid inductor saturation, and the cycle increasing from 0 to 30 for 30 switching cycles; after 30 switching cycles, the constant charging stage begins, where the charging current charges at a constant duty cycle, and the main control MCU monitors the capacitor voltage. When the charging voltage is greater than or equal to 20V, the charging of the energy storage capacitor is completed.

[0063] More specifically, the main control MCU monitors the capacitor voltage using a resistor-divided voltage sampling method. The sampled voltage is processed by proportional gain and filtering, and then sampled and transformed by the main control MCU's analog-to-digital converter (ADC) with a sampling period of 10 cycles to obtain the instantaneous voltage value Ucc. When the MCU determines that this voltage value is 0V, it enters pre-charge mode. The MCU outputs a PWM drive signal with a modulo-duty-cycle through its timer. Based on the capacitor's characteristics, the capacitor has a relatively low impedance, so the MCU enters pre-charge mode with a duty cycle of 10 timing cycles. Each switching cycle increases by 10 timing cycles, and the MCU continues charging the supercapacitor at a fixed duty cycle after calculating 30 timing cycles. Charging stops when the proportional gain voltage sampled by the MCU's ADC is greater than or equal to DC 20V.

[0064] In addition, in the initial state, when the MCU detects that the energy storage capacitor is greater than or equal to DC5V, the charging mode skips the pre-charging stage and charges the supercapacitor with a fixed duty cycle until the energy storage capacitor voltage is greater than or equal to DC20V, at which point charging stops.

[0065] In an optional implementation of this embodiment, the control system further includes an AC / DC conversion circuit, which is disposed between the coil excitation control circuit and the mains power, between the energy storage emergency power supply circuit and the mains power, and between the first step-down circuit and the mains power.

[0066] Specifically, the AC / DC conversion circuit is used to convert AC mains power signals into DC mains power signals.

[0067] In an optional implementation of this embodiment, the control system further includes a third step-down circuit and an elevator status monitoring module. The input terminal of the third step-down circuit is connected to the mains power and the energy storage emergency power supply circuit, and the output terminal of the third step-down circuit is connected to the elevator status monitoring module.

[0068] Specifically, such as Figure 2 As shown, the third step-down circuit includes a third step-down chip U2, an inductor L2, a diode D4, and a diode D5;

[0069] One end of the third step-down chip U2 is connected to the cathode of diode D1 and the cathode of diode D4;

[0070] The other end of the third step-down chip U2 is connected to one end of the inductor L2 and the cathode of the diode D5;

[0071] The anode of diode D4 is connected to the output terminal of the first boost circuit;

[0072] The other end of the inductor L2 and the anode of the diode D5 are connected to the elevator status monitoring module.

[0073] Furthermore, the third step-down circuit is a buck step-down circuit, and the third step-down chip U2 is a TX4130L switching step-down DC / DC chip.

[0074] Furthermore, the elevator status monitoring module is used to detect the status of the elevator during operation.

[0075] Specifically, the mains power input is 46V, and the main control MCU controls the 46V to be reduced to 24V through the third step-down circuit, which is then used by the elevator status monitoring module.

[0076] Furthermore, when the elevator status monitoring module detects a safety issue during elevator operation, it disconnects the QA contactor, de-energizes the electronic safety clamp electromagnet coil, triggers the safety clamp mechanical structure, and the safety clamp actuates to lock the car.

[0077] In an optional implementation of this embodiment, the main control MCU samples the excitation current of the electronic safety clamp electromagnet coil based on the sampling resistor R1, and determines whether there is any jamming phenomenon in the armature of the electronic safety clamp electromagnet coil, including:

[0078] The excitation current of the electromagnet coil of the electronic safety clamp is sampled, the jamming threshold current of the armature of the electromagnet coil when jamming occurs is calculated, the excitation current is compared with the jamming threshold current, and the jamming phenomenon is determined based on the comparison result.

[0079] Specifically, the impedance of the electromagnet coil in the electronic safety clamp is 21Ω, and the excitation voltage is 46V. Before and after the excitation voltage is applied, the inductance L11 of the armature when it is not engaged, and the inductance L22 when it is engaged, are measured. The armature jamming state is detected by analyzing the transient characteristics of the electromagnet coil current. During normal engagement, the current rises rapidly in the initial stage of energization (when the armature is not engaged, the inductance is small). The inductance increases sharply at the moment the armature engages, and the current decreases slightly. When the armature jams, the current rises monotonically according to an exponential curve to V / R (without a falling edge), and the coil current rises even faster (because the inductance is constant and small).

[0080] Furthermore, the algorithm for the current model (monotonically increasing) when the armature is stuck is as follows:

[0081]

[0082] time constant

[0083] Under normal armature engagement, before armature engagement, the expression for the current model is:

[0084]

[0085] At the instant the armature is attracted, the current changes abruptly. The expression for this abrupt current is:

[0086] (0.1 < k < 0.3, determined by the properties of the electromagnet coil itself)

[0087] After the armature is attracted, the expression for the current model is:

[0088]

[0089] time constant

[0090] In the above formula, I fault (t) represents the excitation current when the armature is blocked, V is the excitation voltage of the electromagnet coil, R is the resistance of the electromagnet coil, and L 11 L is the inductance of the armature before it is attracted. 22 t represents the inductance of the armature after it is attracted. close For the absorption time, I dip This is the initial value of the excitation current after the sudden drop.

[0091] Furthermore, the jamming threshold current when the armature experiences jamming is determined using a fixed-time-point current threshold method. Based on the aforementioned current model, the normal armature engagement time t is taken as... close 1.5-2 times (1.5t) close <t check <2t close ), calculate the jamming threshold current when the armature is in a jammed state:

[0092]

[0093] In the formula, I threshold This is the threshold current for the blocking circuit.

[0094] The excitation current I of the electromagnet coil of the sampling electronic safety clamp measured (t check ), and with the threshold current I of the stop threshold Comparison,

[0095] If I measured(tcheck) ≥I threshold If so, it is considered that there is a jamming phenomenon in the armature.

[0096] If I measured(tcheck) <I threshold If so, it is considered that the armature is engaged normally.

[0097] More, such as Figure 6 and Figure 7 As shown, Figure 6The figure shows the current versus time curve of the armature of the electromagnet coil of the electronic safety clamp in Embodiment 1 of the present invention when it is normally engaged. Figure 7 The figure shows the current-time relationship curve of the armature of the electronic safety clamp electromagnet coil in Embodiment 1 of the present invention when there is a jamming phenomenon. As can be seen from the figure, there is a sudden change when the armature of the electronic safety clamp electromagnet coil is normally engaged, while it shows a monotonically increasing trend when it is jammed.

[0098] In an optional implementation of this embodiment, when the electronic safety clamp electromagnet coil is in an emergency state, the energy storage emergency power supply discharges to the electronic safety clamp electromagnet coil.

[0099] Specifically, when the electronic safety clamp electromagnet coil is in emergency mode, the main control MCU outputs a closed-loop duty cycle, which boosts the voltage of the supercapacitor to 30V through the first boost discharge circuit, including the original input voltage of 20V and the input low voltage protection of 10V, so that the output voltage is 30V. Then, it is stepped down to 12V and 24V respectively through the first step-down circuit and the third step-down circuit, which are used as the maintenance voltage output to the electromagnet coil and the elevator status monitoring module, respectively.

[0100] Furthermore, the first boost discharge circuit is used to boost the voltage output by the energy storage emergency power supply before outputting it.

[0101] Furthermore, the first boost circuit is a boost circuit.

[0102] Considering the deficiencies in the power supply control of the emergency power supply component in the existing electronic safety clamp power supply system, the triggering and operation of the emergency power supply component in emergency situations cannot adapt to the needs of the electronic safety clamp during normal operation, resulting in phenomena such as power supply voltage mismatch, insufficient power supply performance, and failure of delay control, which leads to abnormal operation of the electronic safety clamp. Therefore, in this embodiment, a first boost discharge circuit is set to boost the voltage output by the energy storage emergency power supply before output, so that the output emergency power supply is matched with the electronic safety clamp.

[0103] Meanwhile, this method of boosting the voltage first and then bucking it for output avoids irreversible damage when the output is short-circuited.

[0104] Furthermore, the supercapacitor in the energy storage emergency power supply has an output voltage of 30V, an output current of 1.2A, a boost converter, a switching frequency of 40kHz, and a control core that uses a CPU microprocessor to implement a digital PID algorithm. Through harmonic compensation and adaptive parameter adjustment strategies, the output ripple is less than 150mV, the dynamic response recovery time requirement is small, and it can stably output DC30V for input voltage variation range.

[0105] Furthermore, the emergency output time of the energy storage emergency power supply is greater than 6 seconds.

[0106] The emergency output time of the energy storage power supply is set to be greater than 6 seconds, so that the electronic safety gear control system stops control after a 6-second delay. The mechanical structure of the safety gear also operates with a delay to prevent the mechanical structure of the electronic safety gear from braking simultaneously with the traction mechanism brake when the elevator has not stopped at the moment of power failure, thus preventing an excessive emergency stop of the elevator.

[0107] Specifically, the energy storage emergency power supply needs to output 24V 1A and 12V 1A at full load simultaneously, with a total output power of 36W and an output efficiency of approximately 0.9, so the input power P is 40W;

[0108] As the capacitor voltage drops linearly from 20V to 10V, the average voltage...

[0109] The formula for calculating the total energy E of a capacitor during discharge is:

[0110] E = P * t d =40W * 6 = 240J

[0111] In the formula, t d Duration of emergency output.

[0112] Through total energy E and average voltage V avg The calculation formula is as follows:

[0113]

[0114] The calculated capacitance C is 2.13F. Considering a certain margin, in this embodiment, eight supercapacitors are selected in series, and the capacitance of a single supercapacitor is 22F.

[0115] In an optional implementation of this embodiment, the control system further includes an alarm module connected to the main control MCU.

[0116] Specifically, when the control system malfunctions, an alarm is triggered through the alarm module.

[0117] In an optional implementation of this embodiment, the main control MCU is equipped with a manual restart trigger switch.

[0118] Specifically, when the excitation voltage needs to be manually triggered, the excitation voltage of 46V is retried by shorting the contact of the manual restart trigger switch, and the electronic safety clamp electromagnet coil resumes operation.

[0119] It should be noted that the effective repetition time interval of the manual restart trigger switch is 5 seconds.

[0120] In an optional implementation of this embodiment, the working principle of the elevator electronic safety brake control system includes:

[0121] When the mains power is normal and the system is working normally, the mains power input of 46V is sent to the AC / DC conversion circuit, which converts it into DC46V output, and inputs it to the switching transistor Q1 of the coil excitation switch circuit. The main control MCU controls the switching transistor Q1 to conduct, and DC46V is used as the excitation voltage to trigger the electronic safety clamp electromagnet coil to enter the excitation working state.

[0122] The sampling resistor R1 of the coil excitation current sampling circuit samples the excitation current. The main control MCU determines whether the electromagnet coil has entered the excitation working state based on the excitation current. After determining that it has entered the excitation working state, after a 1-second delay, the DC46V input is transmitted to the first step-down circuit and stepped down to 12V as the sustaining voltage to trigger the electronic safety clamp electromagnet coil to enter the sustaining voltage working state.

[0123] Meanwhile, the DC46V input is transmitted to the third step-down circuit, stepped down to 24V, and then transmitted to the elevator status monitoring module;

[0124] After the electromagnet coil of the electronic safety clamp enters the voltage maintenance working state, the main control MCU detects the voltage of the energy storage emergency power supply in the energy storage emergency power supply circuit. The DC46V input is transmitted to the second step-down charging circuit, which steps down the voltage to 20V and charges the supercapacitor in the energy storage emergency power supply.

[0125] When the main control MCU determines that the electromagnet coil has malfunctioned based on the excitation current, or when the elevator status monitoring module detects that the elevator has malfunctioned, the operation of the electromagnet coil is stopped by disconnecting the QA contactor.

[0126] When the mains power is abnormal, the energy storage emergency power supply circuit enters the emergency working state. The supercapacitor in the energy storage emergency power supply outputs an emergency voltage, which is boosted to DC30V by the first boost discharge circuit, and then stepped down to DC12V and DC24V by the first and third step-down circuits, respectively. These voltages are then transmitted to the electromagnet coil and the elevator status monitoring module to maintain their normal operation. After 6 seconds or more, the mechanical structure of the electronic safety clamp is triggered to lock the elevator car.

[0127] When the electromagnet coil is in the maintenance working state, the sampling resistor R1 of the coil excitation current sampling circuit samples the excitation current. The main control MCU determines whether there is a jamming phenomenon in the electromagnet coil based on the current waveform of the excitation current. If there is a jamming phenomenon, the operation of the electromagnet coil is stopped by disconnecting the QA contactor.

[0128] In summary, Embodiment 1 of the present invention provides an elevator electronic safety gear control system. It includes a coil excitation control circuit that samples the excitation current of the electronic safety gear electromagnet coil to determine if the armature of the electromagnet coil is jammed, thereby controlling the working state of the electromagnet coil. If jamming occurs, the circuit is shut off promptly, improving the safety and stability of the electronic safety gear. An energy storage emergency power supply circuit is also included to provide emergency power to the electronic safety gear in case of mains power failure. By incorporating a second step-down charging circuit and a first step-up discharging circuit, the energy storage emergency power supply is adapted to the electronic safety gear. After a delay control period, the mechanical structure of the electronic safety gear is triggered only after the elevator car has come to a complete stop, effectively improving the safety and stability of elevator operation.

[0129] Example 2

[0130] Embodiment 2 of the present invention provides an elevator, which includes an elevator electronic safety gear and the elevator electronic safety gear control system of Embodiment 1. The elevator electronic safety gear control system is used to control the operation of the elevator electronic safety gear.

[0131] In an optional implementation of this embodiment, the elevator's workflow includes:

[0132] With the mains power supply normal, the elevator is in normal working condition. The elevator status monitoring module in the elevator electronic safety gear control system detects that the elevator is normal. The electronic safety gear control system supplies power to the electronic safety gear electromagnet coil, and the electronic safety gear is in a spring-compressed state, allowing the elevator to move normally.

[0133] When the elevator is in normal operation and the mains power fails, the emergency power supply of the elevator electronic safety brake control system will supply power to the electromagnet coil for 6 seconds or more and then stop supplying power. The mechanical structure of the electronic safety brake will then activate after a delay to prevent the electronic safety brake from releasing before the elevator has come to a complete stop, thus avoiding an excessive emergency stop.

[0134] When the elevator status monitoring module detects an abnormality in the elevator, it disconnects the QA contactor, turns on the mains power to the electromagnet coil, triggers the electronic safety clamp mechanical structure, the electronic safety clamp mechanical structure operates, the car is locked, and the elevator is in a safe state.

[0135] When the elevator enters the recovery state, the elevator car moves in the reverse direction to restore power to the electromagnet coil, the electronic safety brake resets, and the elevator resumes normal operation.

[0136] In summary, Embodiment 2 of the present invention provides an elevator, including an elevator electronic safety brake and the elevator electronic safety brake control system of Embodiment 1. The elevator electronic safety brake control system is used to control the operation of the elevator electronic safety brake. It is equipped with a coil excitation control circuit, which samples the excitation current of the electronic safety brake electromagnet coil to determine whether the armature of the electronic safety brake electromagnet coil is jammed, and then controls the working state of the electromagnet coil. When jamming occurs, it is shut off in time, which improves the safety and stability of the electronic safety brake. An energy storage emergency power supply circuit is set up to provide emergency power to the electronic safety brake when the mains power fails. By setting up a second step-down charging circuit and a first step-up discharging circuit, the energy storage emergency power supply and the electronic safety brake are adapted. After a period of time, the mechanical structure of the electronic safety brake is triggered after the elevator car has come to a complete stop, which effectively improves the safety and stability of elevator operation.

[0137] The above provides a detailed description of an elevator electronic safety clamp control system and an elevator provided by the present invention. Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0138] Furthermore, the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An elevator electronic safety brake control system, characterized in that, The control system includes a main control MCU, a coil excitation control circuit, an energy storage emergency power supply circuit, and a first step-down circuit. The main control MCU is connected to the coil excitation control circuit and the energy storage emergency power supply circuit respectively. The input terminals of the coil excitation control circuit, the energy storage emergency power supply circuit, and the first step-down circuit are connected to the mains power. The energy storage emergency power supply circuit is connected to the input terminals of the coil excitation control circuit and the first step-down circuit. The output terminals of the coil excitation control circuit and the first step-down circuit are connected to the electromagnet coil of the electronic safety clamp. The coil excitation control circuit includes a coil excitation switch circuit and a coil excitation current sampling circuit. The coil excitation switch circuit and the coil excitation current sampling circuit are connected to the electronic safety clamp electromagnet coil. The coil excitation switch circuit controls the on / off state of the electronic safety clamp electromagnet coil, and the coil excitation current sampling circuit samples the excitation current of the electronic safety clamp electromagnet coil. The energy storage emergency power supply circuit includes a second buck charging circuit, an energy storage emergency power supply, and a first boost discharging circuit. The input terminal of the second buck charging circuit is connected to the mains power, and the output terminal of the second buck charging circuit is connected to the energy storage emergency power supply. The energy storage emergency power supply is connected to the input terminal of the first boost discharging circuit.

2. The elevator electronic safety brake control system as described in claim 1, characterized in that, The coil excitation switch circuit includes a switching transistor Q1. The main control MCU controls the conduction or cutoff of the electronic safety clamp electromagnet coil by controlling the switching transistor Q1 to turn it on or off.

3. The elevator electronic safety brake control system as described in claim 1, characterized in that, The coil excitation current sampling circuit includes a sampling resistor R1. The main control MCU samples the excitation current of the electronic safety clamp electromagnet coil based on the sampling resistor R1 and determines whether there is any jamming phenomenon in the armature of the electronic safety clamp electromagnet coil.

4. The elevator electronic safety brake control system as described in claim 3, characterized in that, The main control MCU samples the excitation current of the electronic safety clamp electromagnet coil based on the sampling resistor R1, and determines whether there is any jamming in the armature of the electronic safety clamp electromagnet coil, including: The excitation current of the electromagnet coil of the electronic safety clamp is sampled, the jamming threshold current of the armature of the electromagnet coil when jamming occurs is calculated, the excitation current is compared with the jamming threshold current, and the jamming phenomenon is determined based on the comparison result.

5. The elevator electronic safety brake control system as described in claim 1, characterized in that, The energy storage emergency power supply includes several supercapacitors connected in series. When the electronic safety clamp electromagnet coil is in normal working condition, the energy storage emergency power supply is charged based on the input of mains power. When the electronic safety clamp electromagnet coil is in emergency state, the energy storage emergency power supply discharges to the electronic safety clamp electromagnet coil.

6. The elevator electronic safety brake control system as described in claim 1, characterized in that, The coil excitation control circuit also includes a QA contactor. One end of the dry contact of the QA contactor is connected to the coil excitation switch circuit and the coil excitation current sampling circuit, and the other end of the dry contact of the QA contactor is connected to the electronic safety clamp electromagnet coil.

7. The elevator electronic safety brake control system as described in claim 1, characterized in that, The control system further includes an AC / DC conversion circuit, which is located between the coil excitation control circuit and the mains power, between the energy storage emergency power supply circuit and the mains power, and between the first step-down circuit and the mains power.

8. The elevator electronic safety brake control system as described in claim 1, characterized in that, The control system also includes a third step-down circuit and an elevator status monitoring module. The input of the third step-down circuit is connected to the mains power and the energy storage emergency power supply circuit, and the output of the third step-down circuit is connected to the elevator status monitoring module.

9. The elevator electronic safety brake control system as described in claim 1, characterized in that, The control system also includes an alarm module, which is connected to the main control MCU.

10. An elevator, characterized in that, The elevator includes an elevator electronic safety gear and an elevator electronic safety gear control system as described in any one of claims 1-9, wherein the elevator electronic safety gear control system is used to control the operation of the elevator electronic safety gear.

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